JSON数据的处理（二）—— 不同类型的json数据处理方式。

不念不忘少年蓝@ 2022-01-29 12:49 255阅读 0赞

package com.example.demo;
    
    import com.alibaba.fastjson.JSON;
    import com.alibaba.fastjson.JSONArray;
    import com.alibaba.fastjson.JSONObject;
    import org.junit.runner.RunWith;
    import org.springframework.boot.test.context.SpringBootTest;
    import org.springframework.test.context.junit4.SpringRunner;
    
    
    @RunWith(SpringRunner.class)
    @SpringBootTest
    public class Test {
    
                // 第一种格式
                /**
                 *  { "data ": [ { "id ": "*** ", "num ": "** ",* "name ": "** "} ,
                 * "success ": true } ]
                 */
            @org.junit.Test
            public void contextLoads() {
                String s = "{\"success\":true,\"data\":[{\"id\":1,\"num\":20,\"name\":\"老李\",\"model\":[{\"mid\":1,\"mnum\":\"20\"}] }]}";
                JSONObject jsonx = JSON.parseObject(s);
                JSONArray ja = jsonx.getJSONArray("data");
            for (int i = 0; i < ja.size(); i++) {
                JSONObject jo = ja.getJSONObject(i);
                //接收具体数值
               /* Integer id = jo.getInteger("id");
                String name = jo.getString("name");*/
                JSONArray model = jo.getJSONArray("model");
                System.out.println(model.toJSONString());
                //可以把数据直接用实体类接收
                System.out.println(jo.toJSONString());
                TextDemo textDemo = JSON.parseObject(jo.toJSONString(), TextDemo.class);
                System.out.println("textDemo"+textDemo.toString());
            }
        }
    
    //第二种格式
        /**
         * [
         {
         "num ": 11,
         "name":"张三"
         "success ": "true "
         }
         ]
         */
        @org.junit.Test
        public void contextLoads1() {
            String s="[{\"success\":\"true\",\"num\":11,\"name\":\"张三\"}]";
            JSONArray ja = JSON.parseArray(s);
            for (int i = 0; i < ja.size(); i++) {
                JSONObject jo = ja.getJSONObject(i);
                System.out.println(jo.toJSONString());
            }
    
        }
    
    
        // 第三种格式
            /**
             *  { "data ": [ "数据1:":{ "id ": "*** ", "num ": "** ",* "name ": "** "} ,"数据2:":{ "id ": "*** ", "num ": "** ",* "name ": "** "} ,"success ": true } ]
             */
        @org.junit.Test
        public void contextLoads2() {
            String s = "{\"success\":true,\"data\":[{\"数据1\":{\"id\":1,\"num\":20,\"name\":\"老李\",\"model\":[{\"mid\":1,\"mnum\":\"20\"}]},\"数据2\":{\"id\":1,\"num\":10,\"name\":\"老郭\",\"model\":[{\"mid\":1,\"mnum\":\"20\"}]} }]}";
            JSONObject jsonx = JSON.parseObject(s);
            JSONArray ja = jsonx.getJSONArray("data");
            for (int i = 0; i < ja.size(); i++) {
                JSONObject jo = ja.getJSONObject(i);
                System.out.println(jo.toJSONString());
                //有时候我们需要把key也作为一个数据取出来
                    for (String str:jo.keySet()){
                        JSONObject jos = jo.getJSONObject(str);
                        TextDemo demo = JSON.parseObject(jos.toJSONString(), TextDemo.class);
                        System.out.println(demo.toString());
                    }
            //如果"数据1"key一样，那么可以用list接收
            /*List<TextDemo> oddataDto = JSON.parseArray(ja.toJSONString(), TextDemo.class);
            System.out.println(oddataDto.toString());*/
            }
        }
    
    }